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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        const arr = [{
            name: '张三', salary: 10000
        }, {
            name: '李四', salary: 10000
        }, {
            name: '王五', salary: 10000
        },]


        const res = arr.reduce((prev, item) => {
            return prev + item.salary * 1.3
        }, 0)

        console.log(res);

    </script>
</body>

</html>